Toolholder



Sept. 14, 1948. l a. BROWN TOOL HOL-DER V Filed June 17, 194e l 61H01: n

Patented Sept. 14, 1948 UNITED vSTATES PATENT OFFICE TOOLHOLDER Louis Bartley Brown, Duquesne, Pa.

Application June 17, 1946, Serial No. 677,193

1 Claim.

This invention relates to tool holders for metal working lathes, the primary object of the invention being to provide a tool holder which may be readily and easily adjusted so that the tool may be set to various angular positions to facilitate the use and operation of the tool.

An important object of the invention is to provide a tool holder of this character which will provide a large supporting surface to insure against the holder getting out of adjustment due Vto vibrations of the tool holder while in use.

With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts hereinafter more fully described and pointed out in the claim, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

In the accompanying drawing the preferred form of the invention has been shown.

Referring to the drawing Figure 1 is a perspective view of a tool holder constructed in accordance With the invention.

Figure 2 is transverse sectional View through the tool holder.

Referring to the drawing in detail, the reference character 5 indicates the tool rest, which in the present showing is illustrated in dotted lines.

The tool holder comprises a. base plate 6 which has its upper surface concaved as is shown by Figure 2 of the drawing, the base plate being formed with a central opening of a width to receive the washer 'I that cooperates with the head 8 formed at the lower end of the securing bolt 9, in securing the bolt 9 to the tool rest.

The tool rest also includes a plate I0 that has a convex lower surface fitted in the concaved surface of the base plate 6, whereby the plates 6 and I0 may be readily adjusted with respect to each other, within certain bounds, and at the same time provide a structure which is exceptionally strong and durable. The upper surface of the plate I0 is formed with the grooves II and I2, which grooves cooperate with the upper plate I3 of the tool rest in clamping a parting tool or bit to the tool rest.

The securing bolt or post 9 extends through the plates 6, I0, I3, and block I4, the securing bolt or post 9 being supplied with a nut I5 whereby the various plates of the tool rest may be bolted together in securing the tool, which in the present showing are indicated by reference character I6, to the tool rest. Guide pins II are tted in registering openings formed in the plates I0 and I3, the guide pins I'I holding the plates in proper 2 relation in respect to each other to insure the gripping of the tool therebetween.

From the foregoing it will be seen that due to the construction shown and described, I have provided a tool holder for use in connection with metal working lathes, which may be adjusted to various angular positions to facilitate the operation of the tools supported by the device.

It might be'further stated that the opening in the base plate 6, through which the bolt 9 extends, is of a diameter appreciably greater than the diameter of the bolt or post 9 so that a wide adjustment of the plate I0 with respect to the base plate 6 will be permitted, to vary the angle of operation of the bit or tool IS supported by the holder.

Having thus described the invention, what is claimed is:

A tool holder of the class described, comprising a base plate adapted to be tted on the tool rest of a lathe, said base plate having an enlarged central opening and a concaved upper surface, a securing post having a head tted in a groove of the tool rest, said post having threads adjacent to the head, a threaded washer` fitted on the threads and cooperating with the head in securely holding the post in an upright position, a tool clamping plate having a convex lower surface resting on the concaved surface of the base plate and being adjustable with respect thereto, the tool clamping plate having an enlarged opening through which the post extends` the clampingplate pivoting with respect to the post a third plate resting on the last mentioned plate and adapted to clamp a tool therebetween, the latter plate having an opening through which the post extends, a nut on the post cooperating with the head of the bolt in moving the plates to clamp a tool therebetween, and guide pins secured within the tool clamping plate and being loosely mounted within bores of the third plate aligning said tool clamping and third plates.

LOUIS BARTLEY BROWN.

REFERENCES CITED `The following references are of record. in the iile of this patent:

UNITED STATES PATENTS FOREIGN PATENTS Country Date Great Britain 1896 Number Number 

